Provided is a canister that includes a first adsorbing layer K1 including a first adsorbing material Q1 as an adsorbing material Q and a second adsorbing layer K2 including, as the adsorbing material Q, a second adsorbing material Q2 different from the first adsorbing material Q1. The first absorbing layer K1 and the second absorbing layer K2 are provided inside a casing 10. In a flowing direction X of fuel vapor J between one end and another end of the casing 10, the first adsorbing layer K1 is disposed at a position in contact with an air port 10a at the other end, and the second adsorbing layer K2 is disposed closer to the one end than the first adsorbing layer K1 is. The first adsorbing material Q1 adsorbs the fuel vapor J at an adsorbing rate that is higher than an adsorbing rate of the second adsorbing material Q2.

Methods and systems are provided for diagnosing leaks/degradation in a fuel system. In one example, a system for a vehicle may comprise a variable volume device disposed within a fuel tank; an atmospheric port of the variable volume device fluidly coupled to a vent line upstream of a hydrocarbon sensor housed in the vent line, the vent line coupling a fuel vapor canister to atmosphere; and a controller storing instructions for monitoring output of the hydrocarbon sensor; and generating an indication of a degradation in the variable volume device based on the monitored hydrocarbon sensor. In this way, it is possible to effectively detect a degradation/leak in the variable volume device with minimal specialized components in the fuel system.

The invention comprises a method and apparatus for: (1) alternatingly in time inflating and deflating a sealed compartment that includes: a first flexible and deformable seal connected to a pressure control chamber; (2) alternatingly in time pumping a gas into a first chamber and a second chamber separated by a first piston in a first partially sealed cylinder of a double acting kinematic cylinder, the double acting kinematic cylinder further comprising a second partially sealed cylinder, including: a second piston and the pressure control chamber, the pressure control chamber both on a first side of the second piston and within the second partially sealed cylinder; and (3) transferring a force from the first piston to the second piston via a rigid coupler affixed at a first end to the first piston and at a second end to the second piston, such as to alternating inflate and deflate a seal.

Provided is a canister including at least one chamber, an inflow port, an atmosphere port, an outflow port, and a plurality of rod-shaped portions. In the at least one chamber, an adsorbent for fuel vapor is arranged. The plurality of rod-shaped portions is a plurality of elongated portions arranged in an object chamber, which is any of the at least one chamber. The adsorbent arranged in the object chamber is formed as a plurality of granular bodies. At least a part of the plurality of rod-shaped portions has, on an outer peripheral surface thereof, at least one recess formed.

Provided is a canister that can inhibit discharge of evaporated fuel to the atmosphere. One aspect of the present disclosure is a canister. The canister includes a charge port, a purge port, an atmosphere port, a main chamber to which a charge port and a purge port are connected, a sub chamber to which the atmosphere port is connected, an intermediate chamber arranged between the main chamber and the sub chamber in a flow path of an evaporated fuel, the intermediate chamber being connected to each of the main chamber and the sub chamber, a first adsorbent stored in the main chamber, second adsorbent stored in the sub chamber, and a third adsorbent stored it intermediate chamber. An adsorption capacity of the third adsorbent is smaller than each of an adsorption capacity of the first adsorbent and an adsorption capacity of the second adsorbent.

A reusable activated carbon filter is disclosed. It comprises: an outer mesh hollow cylinder, having a plurality of meshes formed thereon; an inner mesh hollow cylinder, having a plurality of meshes formed thereon, located inside the outer mesh hollow cylinder; two fixing rings, each having a plurality of long curved openings and a plurality of fixing holes, and fixing the outer mesh hollow cylinder and the inner mesh hollow cylinder at the same end; two flexible padding rings, each having a plurality of fixing protrusions, and detachably padding the long curved openings of one of the fixing rings with one fixing protrusion plugged in one corresponding fixing hole; a top connector, removably connected to one fixing ring, having a connecting opening for connecting to an inline fan; and a bottom cover, connected to the other fixing ring. Activated carbon granules are filled between the two mesh hollow cylinders.

A dehumidifier apparatus is provided. The apparatus includes a housing having an interior space and a vent for permitting airflow into the interior space. The apparatus also includes a cartridge sized for removable insertion into the interior space of the housing. The cartridge includes a tray defining a first pocket, a second pocket, and a channel extending from the first pocket to the second pocket. The cartridge also includes a cover coupled to the tray over the first pocket such that the first pocket is in fluid communication with the second pocket via the channel. The cover has a first layer and a second layer detachable from the first layer. The first layer is gas permeable and liquid impermeable. The second layer is gas impermeable and liquid impermeable. The cartridge further includes a desiccant material contained in the first pocket by the cover.

A battery retaining system for a portable oxygen concentrator includes a first rail configured to receive a first slide of a battery, a second rail configured to receive a second slide of the battery, the second rail being spaced apart from the first rail so as to form a channel configured to receive the battery, and a flexible stiffening mechanism configured to impart a biasing force on a surface of the battery when the battery is received within the channel. The flexible stiffening mechanism includes a protrusion projecting from the first rail at least partially towards the second rail and a slit positioned behind the protrusion and configured to facilitate travel of the protrusion fore and aft.

A portable oxygen concentrator designed for medical use where the sieve beds, adsorbers, are designed to be replaced by a patient. The concentrator is designed so that the beds are at least partially exposed to the outside of the system and can be easily released by a simple user-friendly mechanism. Replacement beds may be installed easily by patients, and all gas seals will function properly after installation.

A cartridge mounting an air treatment material is a housing defining a housing in a perimeter. The air treatment material is received within the housing, and spaced from the inner wall of the housing by a plurality of resilient sheets. There is an inlet direction into the housing for air flowing across the air treatment material and an outlet opening on an opposed side of the housing. There are top and bottom surfaces and side surfaces forming a perimeter about the air treatment material. The resilient sheets extend substantially continuously across the side surfaces and the top and bottom surfaces at least at the inlet end to increase airflow across the air treatment material. An enclosed inhabited space is also disclosed and claimed.